If you need something to handle your newsletters and subscriptions, LaterOn is a good candidate. It's an AI-powered aggregator and scheduler that keeps your inbox tidy. With features like AI summarization, scheduled email summaries, one-click unsubscribe and multilingual support, it's designed to declutter your inbox and present you with an ad-free reading experience. The service also includes a ChatGPT-like AI assistant and font customization, so it's a pretty full featured newsletter reader.
Another contender is Inbox Zero, an open-source, Google-backed personal AI assistant. It can help you get your email life in order by automating tasks like bulk unsubscribing from newsletters and blocking cold emails. With automated responses, a one-click newsletter cleaner and inbox analytics, Inbox Zero is integrated with Gmail and Google Workspace email accounts, so it's a good choice if you're already in the Google ecosystem.